Island



(No Model.)

J. OGONNELL.

AUTOMATIC ALARM FOR FRICTION BBARiNGS. No. 308,192.. Patented Nov. 18, 1884..

- WITNESSES: INVENTOR: m Gflmw J v BY ATTORNEYS.

' the wire D loosely passes.

ilNirnn Tiaras arena? Q JOHN OCONNELL, OF PROVIDENCE, RHOEE ISLAND.

AUTOMATIC ALARM FOR FRiCTiON-BEARINGS.

SPECIFICATION forming part of Letters Patent No. 308,192, dated November 18, 1884.

Application filed May 26, 1884. (No model.)

To all whom it may concern.-

Be it known that I, JOHN OOoNNnLL, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved Automatic Alarm for Friction- Bearings, of which the following is a full, clear, and exact description.

The object of my invention is to provide for giving an alarm or signal when the bearings of shafting or parts of machinery become overheated by friction.

The invention consists in the construction and combination of parts. as will be hereinafter fully described and claimed.

The drawings represent two modes of car rying out the invention, and by the use of bell or gong signals.

Figure 1 shows the improvement applied to the journal-box of a power-transmitting shaft, and Fig. 2 shows its application to the crankpin bearing of a steam-engine.

Referring, first, to Fig. 1 of the drawings, A is a powertransmitting shaft, and 13 its journal box or bearing. 0 is the fusible head, which is attached to the end' of a wire, I), which connects suitably at cl with a lever, E, fulerumed at e on a post, F, fastened to the box B. The lever is bent downward at g to form an arm, G, to which the bell H is con nected, as shown, and the end of arm G carries, or may carry, a foot-piece, 2', which may be struck by any suitable stud or tappet, I, fixed on the shaft A, when thebearin becomes hot enough to melt the fusible head 0. The head 0 is held in contact with the bearing B by confinement beneath a bridge piece or plate, 0, fixed to the bearing, through which plate 0 It is evident that when the head 0 melts the superior weight of the bell H will carry the arm G of lever E down to the shaftA, and the stud I will strike the arm to ring the bell at every revolution of the shaft.

Referring now to Fig. 2, J is the crank-disk of a steam-engine, and K the wrist-pin on which the connecting-rod L is fitted by its brasses Z. M is an arm, fitted at one end into the end of the wrist-pin K, and carrying at its other end the gong-bell N, which is shown as having two oppositely-arranged tongues or elappers, O O, loosely connected with the arm M at m, and connecting by wires P P with the fusible plugs R R,fitted snugly into the end bores, S S, of the wrist-pin K, and so as to hold the clappers O 0 out of contact with the gong N until the overheating of the bearingsurface of the wrist-pin melts the plug R and permits the clapper O to be thrown outward by centrifugal force to sound the gongbell and give the alarm. But one fusible plug It, wire P, and clapper 0 need be used, if preferred.

I do not limit myself to the precise modes shown of setting the fusible heads or plugs in place, as they may be located in any way so as to receive the heat from the friction-surfaces. My improvement may also be applied to give an alarm by the overheating of reciprocating or sliding surfaces, as will readily be understood.

The wire connections to the fusible head or plug may be arranged with suitable actuating mechanism or electrical devices to give a Variety of signals to notify the engineer or attendants of the overheating of friction-surfaces in time to prevent serious damage to the machinery.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with ajournal-bearing and its journal, of a fusible material adapted to be fused by undue heat of said parts, and connected to an alarm, said alarm being constructed to be operated directly by the journal upon the fusing of the plug, substantially as shown and described.

2. The combination, with a shaftjournal bearing, of a fusible head retained on the bearing,and a bell-carrying lever connected with the fusible head and arranged to be struck by a tappet on the shaft when the fusible head melts, substantially as described.

3. The combimttion, with the wrist-pin of an engine, of a bell supported thereon, and fusible plugs held in the wrist-pin and connected by wires to the clappers of the bell, substantially as described.

4-. The combination, with the journal-bearing B and the bridge 0, secured thereto, of the pivoted lever E, connected at its inner end with the bridge 0 by a fusible head, 0, and

provided on its outer end with an arm, Gr, conand arm G, provided with the projectioni and nected with an alarm mechanism, and adaptalarm-bell H, said projection being concd to be operated by a projection on the jourstructed to be struck by the tappet I on the 11:11 to cause said arm to sound said alarm journal upon the fusing of the head, substan- 5 upon the fusing of the head, substantially as tially as shown and described.

set forth. T T

5. The combination, with the journal-bear- Jon) 0 CON} ing B and the bridge a, secured thereto, of the \Vitncsses: lever E, pivoted to standard F, and connected HENRY L. GOODWIN, 10 with the bridge by a link, D, and fusible head G. SEDGWIOK. 

